The Temperate House - Kew Gardens. This is the largest surviving Victorian glasshouse in the world (b. 1859). It's also the final resting place for many plants which have outgrown their initial berth. The Chilean Wine Palm is 18 metres tall, & was raised from a seed 20 years before the Temperate House was built. Royal Botanic Gardens, Kew, TW9. Nearest Tube: Kew Gardens.